Before engaging in any change process, leaders would do well to review the Four Realities of Change as identified by Timothy Clark in his book EPIC Change (page 111):

You don’t have all the facts

You can’t remove all the risk

You can’t promise zero loss

You can’t eliminate the pain

What this means is that as a change leader you should not pretend that these realities don’t exist and when communicated will go much further in producing trust in those who you would have join you in the organizational change.